 /*******************************************************************************
  * Copyright (c) 2000, 2006 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.update.core;

 import org.eclipse.update.core.model.*;
 import org.eclipse.update.internal.core.*;

 /**
  * Convenience implementation of plug-in entry.
  * <p>
  * This class may be instantiated or subclassed by clients.
  * </p>
  * <p>
  * <b>Note:</b> This class/interface is part of an interim API that is still under development and expected to
  * change significantly before reaching stability. It is being made available at this early stage to solicit feedback
  * from pioneering adopters on the understanding that any code that uses this API will almost certainly be broken
  * (repeatedly) as the API evolves.
  * </p>
  * @see org.eclipse.update.core.IPluginEntry
  * @see org.eclipse.update.core.model.PluginEntryModel
  * @since 2.0
  */
 public class PluginEntry extends PluginEntryModel implements IPluginEntry {
     
     // PERF: new instance variable
 private VersionedIdentifier versionId;

     /**
      * Plug-in entry default constructor
      */
     public PluginEntry() {
         super();
     }

     /**
      * Returns the identifier of this plugin entry
      *
      * @see IPluginEntry#getVersionedIdentifier()
      * @since 2.0
      */
     public VersionedIdentifier getVersionedIdentifier() {
         if (versionId != null)
             return versionId;

         String id = getPluginIdentifier();
         String ver = getPluginVersion();
         if (id != null && ver != null) {
             try {
                 versionId = new VersionedIdentifier(id, ver);
                 return versionId;
             } catch (Exception e) {
                 UpdateCore.warn("Unable to create versioned identifier:" + id + ":" + ver); //$NON-NLS-1$ //$NON-NLS-2$
 }
         }

         versionId = new VersionedIdentifier("",null); //$NON-NLS-1$
 return versionId;
     }

     /**
      * Sets the identifier of this plugin entry.
      *
      * @see IPluginEntry#setVersionedIdentifier(VersionedIdentifier)
      * @since 2.0
      */
     public void setVersionedIdentifier(VersionedIdentifier identifier) {
         setPluginIdentifier(identifier.getIdentifier());
         setPluginVersion(identifier.getVersion().toString());
     }

     /**
      * Compares two plugin entries for equality
      *
      * @param object plugin entry object to compare with
      * @return <code>true</code> if the two entries are equal,
      * <code>false</code> otherwise
      * @since 2.0
      */
     public boolean equals(Object object) {
         if (!(object instanceof IPluginEntry))
             return false;
         IPluginEntry e = (IPluginEntry) object;
         return getVersionedIdentifier().equals(e.getVersionedIdentifier());
     }

 }

